M. M. Jacob (9 August 1926 – 8 July 2018), in full Mundakkal Mathew Jacob, was an Indian politician, working in Indian National Congress. He married Achamma Kunnuthara from Tiruvalla, Kerala (since deceased) and had four daughters. He was appointed Governor of Meghalaya in 1995 and again in 2000 for a second term. He also discharged the function of the Governor of Arunachal Pradesh as well for some time in 1996. He is longest serving governor of any Indian state. He served for more than 11 years.